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WHAT IS THIS
Paste any text and inject invisible Unicode characters (zero-width spaces) between words. You control the amount, the distance, and which character set to use. You can also see exactly where they are with reveal mode.
WHAT YOU CAN DO
Inject Hidden Characters
Add invisible Unicode characters (U+200B, U+200C, U+200D) between words. Good for watermarking text, making unique strings, or testing hidden content detection.
Full Control
Set exactly how many characters go between each word, how often they appear, and which hidden characters to use. Pick one or mix multiple.
Reveal Mode
Toggle "Reveal Hidden" to make invisible characters show up as highlighted symbols so you can see exactly where they are, without losing the ability to copy the raw text.
Max Limit Protection
Set a max total of hidden characters (up to 15,000) to stop over-injection. The MAX button fills it to the limit instantly.
QUICK START
01
Go to the live site
02
Paste or type your text into the source box
03
Choose your settings: pick a preset (Light, Medium, Extreme, Random), select which hidden characters to use, set how many per gap and how often, adjust the max total if needed
04
Copy the output with the invisible characters inside
05
Click "Reveal Hidden" to see where all the characters ended up
No setup, no downloads, no accounts needed.
SETTINGS EXPLAINED
| Setting | What It Does |
|---|---|
| Presets | Quick setups: Light (1/10), Medium (3/3 mixed), Extreme (7/1 all chars), Random (everything randomized) |
| Hidden Chars | Choose from ZWSP (U+200B), ZWNJ (U+200C), ZWJ (U+200D). Multi-select is allowed |
| Per Gap | How many hidden characters get inserted each time |
| Gap Every | How often to insert: 1 = every word, 2 = every other word, and so on |
| Max Hidden | Hard cap on total hidden characters injected |
SUPPORT THIS PROJECT
If you find this useful, here are a few ways to help out:
- ⭐Star the GitHub repo
- 🐛Report bugs in the issues tab
- 💡Suggest features in discussions